Re: [PATCH] x86: Fix potential overflow in perfctr reservation

[Andi Kleen]

> 
> The created a warning storm:

Hmm, yes good idea to fix that. Probably for x86-64 too.

> 
> I worry rather a lot about how well runtime tested this very late change
> was, 

I tested it with oprofile and checked the nmi watchdog.

> and whether it works correctly even with this fix applied.  Perhaps 
> we should jsut revert?

Then you get the memory corruption back.

The change really only enlarges the bitmaps a little anyways, it does not
change any algorithms.

-Andi
 
 

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